Posted by **jerson** on Thursday, April 22, 2010 at 6:25am.

A local movie theater found that if the admission was $13, the attendance was about 1900 customers per day. When the price of admission was dropped to $7, attendance increased to about 3000 per day. Write a linear equation for the attendance in terms of price, p. (A=mp+b)

Ok this is what i got

A-3000-1900/7-13

= -550/3

A-1900=-550/3(P-13)

A-1900=-550/3P+7150/3

And it says the answer is

-550/3p+12850/3

I'm confused with how they got 12850/3 instead of 9050/3 because if you add 1900 and 7150 that's what u get..

thanks in advance

- math -
**Reiny**, Thursday, April 22, 2010 at 8:34am
let's take it from

A-1900=-550/3(P-13) , which is correct

I usually try to eliminate my fractions, so I will multiply by 3

3A - 5700 = -550(P-13)

3A - 5700 = -550P + 7150

3A = -550P + 7150 + 5700

3A = -550P + 12850

A = (-550/3)P + 12850/3

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